What Is a Small Satellite?
A small satellite is any spacecraft with a mass below approximately 500 kg. The category spans a wide range: CubeSats (0.5 kg – 25 kg), nanosatellites (1-10 kg), microsatellites (10-100 kg), and minisatellites (100-500 kg). Below 10 kg, the CubeSat standard (100x100mm cross-section) dominates. Above 100 kg, missions increasingly use custom platforms with standard interfaces.
Small satellites are used for Earth observation, communications, IoT data collection, technology demonstration, and scientific research. The falling cost of launch — driven by rideshare and small launch vehicles — has made smallsat missions accessible to universities, startups, and government agencies worldwide.
SmallSat Mass Classes and Launch Options
Launch options depend primarily on payload mass. The table below maps mass class to recommended launch approaches in 2026.
| Mass Class | Mass Range | Best Launch Option | Typical Cost |
|---|---|---|---|
| CubeSat (1U-6U) | 0.5 – 8 kg | Rideshare mission | $3,000 – $15,000 |
| CubeSat (12U-16U) | 8 – 24 kg | Rideshare or OTV | $15,000 – $50,000 |
| Microsatellite | 10 – 100 kg | Rideshare or small dedicated | $50,000 – $500,000 |
| Minisatellite | 100 – 500 kg | Dedicated small launch vehicle | $2M – $10M |
Launch Vehicle Options for SmallSats
Three categories of launch vehicles serve the small satellite market: large rideshare rockets, small dedicated launch vehicles, and orbital transfer vehicles.
Large Rideshare Rockets
SpaceX Falcon 9 Transporter missions carry 50-100+ smallsat payloads per flight to SSO or LEO. Arianespace Vega-C and ISRO PSLV also offer regular rideshare manifests. These missions provide the lowest cost per kg for payloads under 150 kg but offer no orbit customization beyond the primary mission inclination.
Small Dedicated Launch Vehicles
Rocket Lab Electron (300 kg to LEO), ISRO SSLV (500 kg to SSO), and Exos Aerospace SARGE serve missions requiring orbit control or time-critical launches. Dedicated vehicles cost $5M-$10M for the full rocket but allow custom inclinations, altitudes, and launch windows — essential for constellation builders and time-critical government missions.
Orbital Transfer Vehicles (OTVs)
OTVs like D-Orbit ION, Exolaunch Reliant, and Momentus Vigoride ride a rideshare mission to a standard orbit then use their own propulsion to deliver customer satellites to custom orbits. OTVs bridge the gap between low-cost rideshare and expensive dedicated launch, adding 1.5x to 3x the base rideshare cost in exchange for orbit flexibility.
Choosing the Right Orbit for Your SmallSat
Orbit selection drives mission design, launch cost, and data latency. The most common SmallSat orbit options are:
- Sun-Synchronous Orbit (SSO) at 500-600 km — consistent sun angle, ideal for Earth observation and optical imaging.
- Low Earth Orbit (LEO) at 400-600 km — lowest launch cost, shortest ground contact latency, fast revisit for communications constellations.
- Polar Orbit (PO) at 600-800 km — global coverage for monitoring and IoT, used by most large constellations.
- Medium Earth Orbit (MEO) at 8,000-20,000 km — used for navigation (GPS, Galileo) and some communications systems.
Most commercial rideshare missions target SSO at 525-550 km. Browse rideshare windows by orbit on KOSMOLAB SPACE to match your mission requirements.
Key Steps in a SmallSat Launch Program
A typical small satellite launch program follows these phases regardless of payload size:
- Mission definition — Define orbit, payload, power budget, link budget, and operational lifetime. This drives launch vehicle and orbit selection.
- Launch provider selection — Compare verified providers on KOSMOLAB SPACE by orbit, form factor, lead time, and price per kg.
- Slot reservation — Sign a Launch Services Agreement (LSA) with the selected provider. Typical deposit: 20-30% of total launch cost.
- Payload integration — Deliver satellite to the integration facility. Provider installs the satellite into the deployment system (P-POD, J-BOX, ISIPOD, etc.).
- Launch site transport — Integrated dispenser is transported to the launch site. Customer attends as observer or monitors remotely.
- Launch and deployment — Satellite is deployed on-orbit. Provider confirms deployment via telemetry. Customer acquires first contact.
- Post-launch support — Some providers offer 6-12 months of orbital tracking data and TLE updates.
Regulatory Requirements for SmallSat Launches
Every satellite launch requires regulatory compliance regardless of payload size. Key requirements include:
- Frequency coordination — ITU frequency filing via your national administration. Start 3-6 months before launch. IARU coordination required for amateur bands.
- Export control (ITAR/EAR) — US-origin components or technology may require export licenses. Non-US operators should check domestic equivalents.
- Orbital debris compliance — FCC (USA) requires satellites below 2,000 km to deorbit within 5 years. Most rideshare orbits at 550 km or below naturally deorbit within 5 years.
- Launch licensing — Your launch provider handles FAA (USA) or equivalent launch licenses. Customer provides payload documentation for the application.
Frequently Asked Questions
What is the cheapest way to launch a small satellite?
Rideshare missions on large rockets like SpaceX Falcon 9 Transporter are the cheapest option for satellites below 150 kg. A 3U CubeSat (500g to 2kg) costs $5,000 to $12,000 on rideshare. Larger SmallSats (50-100 kg) cost $200,000 to $800,000 on rideshare missions. For satellites above 300 kg or those requiring a specific orbit, a dedicated small launch vehicle like Rocket Lab Electron becomes competitive. Compare current pricing on KOSMOLAB SPACE provider pages.
How long does a SmallSat launch program take?
From mission definition to first contact on orbit, a typical SmallSat program takes 12 to 36 months. CubeSat rideshare missions at the fast end (simple 1U/3U with commercial off-the-shelf components) can achieve launch in 9-12 months. Complex microsatellite programs with custom hardware typically require 24-36 months. The critical path is usually satellite development, not launch vehicle availability.
Do I need a license to launch a satellite?
Yes. You need frequency coordination from your national telecommunications regulator (FCC in the US, Ofcom in the UK, etc.) and you must comply with national space law for satellite operations. Your launch provider handles the launch vehicle licensing with the FAA or equivalent authority. Most providers include launch licensing support in their service. Start frequency coordination at least 6 months before your planned launch date.
What is the difference between a CubeSat and a SmallSat?
A CubeSat is a small satellite built to the CubeSat standard — a 100x100mm cross-section (one U unit, 1.33 kg max) with standard interfaces and deployment mechanisms. SmallSat is a broader term covering all satellites below about 500 kg, including CubeSats. Every CubeSat is a SmallSat, but not every SmallSat is a CubeSat. SmallSats above 10 kg typically use custom platforms with proprietary bus designs rather than the CubeSat standard.
Which orbit is best for Earth observation SmallSats?
Sun-Synchronous Orbit (SSO) at 500-600 km altitude is the standard choice for Earth observation SmallSats. The consistent solar illumination angle allows predictable imaging conditions across all ground tracks. SSO rideshare missions are the most abundant on the market, with SpaceX Transporter and multiple other providers flying SSO missions several times per year. View SSO rideshare windows on KOSMOLAB SPACE to find the next available slot.